don't miss "china: change and challenge" at 8:00 p.m. japan time. >>> the company operating the hot air balloon involved in a fatal crash in egypt last month says pilot error or part defects may be to blame. 19 foreign tourists died in the accident at ancient ruins in the city of luxor. they spoke for the first time in cairo. >> there is no scenario for the accident except either a pilot mistake which is throwing the drop line without making sure it was not entangled with the hose. the other is a manufacturing fault. >> the president expressed deep apology. he said he spoke to the pilot in the hospital. the captain reportedly said that after the balloon caught fire, he fell and tried to reach the safety valve of a gas cylinder but failed as he was engulfed in flames. the egyptian government is still investigating the accident. >>> people in northeastern japan spent two years trying to get back on their feet. next month marks the second anniversary of the earthquake, tsunami, and nuclear accident. the march 11th disaster left nearly 2,000